Power control for concurrent transmissions

ABSTRACT

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless node may determine, when in communication with a plurality of other wireless nodes via a plurality of links of a network, a plurality of transmit powers for the plurality of links, wherein the plurality of transmit powers are selected to control inter-link interference or to satisfy a maximum transmit power criterion. The wireless node may transmit, using the plurality of transmit powers for the plurality of links, information, to the plurality of other wireless nodes, concurrently, based at least in part on determining the plurality of transmit powers for the plurality of links. Numerous other aspects are provided.

CROSS-REFERENCE TO RELATED APPLICATIONS UNDER 35 U.S.C. § 119

This application claims priority to U.S. Provisional Patent ApplicationNo. 62/578,197, filed on Oct. 27, 2017, entitled “TECHNIQUES ANDAPPARATUSES FOR POWER CONTROL FOR CONCURRENT TRANSMISSIONS,” which ishereby expressly incorporated by reference herein.

FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wirelesscommunication, and more particularly to techniques and apparatuses forpower control for concurrent transmissions.

BACKGROUND

Wireless communication systems are widely deployed to provide varioustelecommunication services such as telephony, video, data, messaging,and broadcasts. Typical wireless communication systems may employmultiple-access technologies capable of supporting communication withmultiple users by sharing available system resources (e.g., bandwidth,transmit power, and/or the like). Examples of such multiple-accesstechnologies include code division multiple access (CDMA) systems, timedivision multiple access (TDMA) systems, frequency-division multipleaccess (FDMA) systems, orthogonal frequency-division multiple access(OFDMA) systems, single-carrier frequency-division multiple access(SC-FDMA) systems, time division synchronous code division multipleaccess (TD-SCDMA) systems, and Long Term Evolution (LTE).LTE/LTE-Advanced is a set of enhancements to the Universal MobileTelecommunications System (UMTS) mobile standard promulgated by theThird Generation Partnership Project (3GPP).

A wireless communication network may include a number of base stations(BSs) that can support communication for a number of user equipment(UEs). A user equipment (UE) may communicate with a base station (BS)via the downlink and uplink. The downlink (or forward link) refers tothe communication link from the BS to the UE, and the uplink (or reverselink) refers to the communication link from the UE to the BS. As will bedescribed in more detail herein, a BS may be referred to as a Node B, agNB, an access point (AP), a radio head, a transmit receive point (TRP),a new radio (NR) BS, a 5G Node B, and/or the like.

The above multiple access technologies have been adopted in varioustelecommunication standards to provide a common protocol that enablesdifferent user equipment to communicate on a municipal, national,regional, and even global level. New radio (NR), which may also bereferred to as 5G, is a set of enhancements to the LTE mobile standardpromulgated by the Third Generation Partnership Project (3GPP). NR isdesigned to better support mobile broadband Internet access by improvingspectral efficiency, lowering costs, improving services, making use ofnew spectrum, and better integrating with other open standards usingorthogonal frequency division multiplexing (OFDM) with a cyclic prefix(CP) (CP-OFDM) on the downlink (DL), using CP-OFDM and/or SC-FDM (e.g.,also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) onthe uplink (UL), as well as supporting beamforming, multiple-inputmultiple-output (MIMO) antenna technology, and carrier aggregation.However, as the demand for mobile broadband access continues toincrease, there exists a need for further improvements in LTE and NRtechnologies. Preferably, these improvements should be applicable toother multiple access technologies and the telecommunication standardsthat employ these technologies.

SUMMARY

In some aspects, a method of wireless communication may includedetermining, when in communication with a plurality of other wirelessnodes via a plurality of links of a network, a plurality of transmitpowers for the plurality of links, wherein the plurality of transmitpowers are selected to control inter-link interference or to satisfy amaximum transmit power criterion. The method may include transmitting,using the plurality of transmit powers for the plurality of links,information, to the plurality of other wireless nodes, concurrently,based at least in part on determining the plurality of transmit powersfor the plurality of links.

In some aspects, a wireless node for wireless communication may includememory and one or more processors operatively coupled to the memory. Thememory and the one or more processors may be configured to determine,when in communication with a plurality of other wireless nodes via aplurality of links of a network, a plurality of transmit powers for theplurality of links, wherein the plurality of transmit powers areselected to control inter-link interference or to satisfy a maximumtransmit power criterion. The memory and the one or more processors maybe configured to transmit, using the plurality of transmit powers forthe plurality of links, information, to the plurality of other wirelessnodes, concurrently, based at least in part on determining the pluralityof transmit powers for the plurality of links.

In some aspects, a non-transitory computer-readable medium may store oneor more instructions for wireless communication. The one or moreinstructions, when executed by one or more processors of a wirelessnode, may cause the one or more processors to determine, when incommunication with a plurality of other wireless nodes via a pluralityof links of a network, a plurality of transmit powers for the pluralityof links, wherein the plurality of transmit powers are selected tocontrol inter-link interference or to satisfy a maximum transmit powercriterion. The one or more instructions, when executed by the one ormore processors, may cause the one or more processors to transmit, usingthe plurality of transmit powers for the plurality of links,information, to the plurality of other wireless nodes, concurrently,based at least in part on determining the plurality of transmit powersfor the plurality of links.

In some aspects, an apparatus for wireless communication may includemeans for determining, when in communication with a plurality of otherwireless nodes via a plurality of links of a network, a plurality oftransmit powers for the plurality of links, wherein the plurality oftransmit powers are selected to control inter-link interference or tosatisfy a maximum transmit power criterion. The apparatus may includemeans for transmitting, using the plurality of transmit powers for theplurality of links, information, to the plurality of other wirelessnodes, concurrently, based at least in part on determining the pluralityof transmit powers for the plurality of links.

Aspects generally include a method, apparatus, device, computer programproduct, non-transitory computer-readable medium, user equipment,wireless communication device, base station, access point, wirelessnode, access node, central unit, and processing system as substantiallydescribed herein with reference to and as illustrated by theaccompanying drawings and specification.

The foregoing has outlined rather broadly the features and technicaladvantages of examples according to the disclosure in order that thedetailed description that follows may be better understood. Additionalfeatures and advantages will be described hereinafter. The conceptionand specific examples disclosed may be readily utilized as a basis formodifying or designing other structures for carrying out the samepurposes of the present disclosure. Such equivalent constructions do notdepart from the scope of the appended claims. Characteristics of theconcepts disclosed herein, both their organization and method ofoperation, together with associated advantages will be better understoodfrom the following description when considered in connection with theaccompanying figures. Each of the figures is provided for the purpose ofillustration and description, and not as a definition of the limits ofthe claims.

BRIEF DESCRIPTION OF THE DRAWINGS

So that the manner in which the above-recited features of the presentdisclosure can be understood in detail, a more particular description,briefly summarized above, may be had by reference to aspects, some ofwhich are illustrated in the appended drawings. It is to be noted,however, that the appended drawings illustrate only certain typicalaspects of this disclosure and are therefore not to be consideredlimiting of its scope, for the description may admit to other equallyeffective aspects. The same reference numbers in different drawings mayidentify the same or similar elements.

FIG. 1 is a block diagram conceptually illustrating an example of awireless communication network, in accordance with various aspects ofthe present disclosure.

FIG. 2 is a block diagram conceptually illustrating an example of a basestation in communication with a user equipment (UE) in a wirelesscommunication network, in accordance with various aspects of the presentdisclosure.

FIGS. 3A and 3B are block diagrams conceptually illustrating an exampleof a frame structure in a wireless communication network, in accordancewith various aspects of the present disclosure.

FIG. 4 is a block diagram conceptually illustrating an example subframeformat with the normal cyclic prefix, in accordance with various aspectsof the present disclosure.

FIG. 5 illustrates an example logical architecture of a distributedradio access network (RAN), in accordance with various aspects of thepresent disclosure.

FIG. 6 illustrates an example physical architecture of a distributedRAN, in accordance with various aspects of the present disclosure.

FIGS. 7A and 7B are diagrams illustrating an example of a networktopology for a network, in accordance with various aspects of thepresent disclosure.

FIGS. 8A and 8B are diagrams illustrating an example of power controlfor concurrent transmissions, in accordance with various aspects of thepresent disclosure.

FIG. 9 is a diagram illustrating an example process performed, forexample, by a wireless node, in accordance with various aspects of thepresent disclosure.

DETAILED DESCRIPTION

Various aspects of the disclosure are described more fully hereinafterwith reference to the accompanying drawings. This disclosure may,however, be embodied in many different forms and should not be construedas limited to any specific structure or function presented throughoutthis disclosure. Rather, these aspects are provided so that thisdisclosure will be thorough and complete, and will fully convey thescope of the disclosure to those skilled in the art. Based at least inpart on the teachings herein one skilled in the art should appreciatethat the scope of the disclosure is intended to cover any aspect of thedisclosure disclosed herein, whether implemented independently of orcombined with any other aspect of the disclosure. For example, anapparatus may be implemented or a method may be practiced using anynumber of the aspects set forth herein. In addition, the scope of thedisclosure is intended to cover such an apparatus or method which ispracticed using other structure, functionality, or structure andfunctionality in addition to or other than the various aspects of thedisclosure set forth herein. It should be understood that any aspect ofthe disclosure disclosed herein may be embodied by one or more elementsof a claim.

Several aspects of telecommunication systems will now be presented withreference to various apparatuses and techniques. These apparatuses andtechniques will be described in the following detailed description andillustrated in the accompanying drawings by various blocks, modules,components, circuits, steps, processes, algorithms, and/or the like(collectively referred to as “elements”). These elements may beimplemented using hardware, software, or combinations thereof. Whethersuch elements are implemented as hardware or software depends upon theparticular application and design constraints imposed on the overallsystem.

It is noted that while aspects may be described herein using terminologycommonly associated with 3G and/or 4G wireless technologies, aspects ofthe present disclosure can be applied in other generation-basedcommunication systems, such as 5G and later, including NR technologies.

FIG. 1 is a diagram illustrating a network 100 in which aspects of thepresent disclosure may be practiced. The network 100 may be an LTEnetwork or some other wireless network, such as a 5G or NR network.Wireless network 100 may include a number of B Ss 110 (shown as BS 110a, BS 110 b, BS 110 c, and BS 110 d) and other network entities. A BS isan entity that communicates with user equipment (UEs) and may also bereferred to as a base station, a NR BS, a Node B, a gNB, a 5G node B(NB), an access point, a transmit receive point (TRP), and/or the like.Each BS may provide communication coverage for a particular geographicarea. In 3GPP, the term “cell” can refer to a coverage area of a BSand/or a BS subsystem serving this coverage area, depending on thecontext in which the term is used.

A BS may provide communication coverage for a macro cell, a pico cell, afemto cell, and/or another type of cell. A macro cell may cover arelatively large geographic area (e.g., several kilometers in radius)and may allow unrestricted access by UEs with service subscription. Apico cell may cover a relatively small geographic area and may allowunrestricted access by UEs with service subscription. A femto cell maycover a relatively small geographic area (e.g., a home) and may allowrestricted access by UEs having association with the femto cell (e.g.,UEs in a closed subscriber group (CSG)). A BS for a macro cell may bereferred to as a macro BS. A BS for a pico cell may be referred to as apico BS. ABS for a femto cell may be referred to as a femto BS or a homeBS. In the example shown in FIG. 1, a BS 110 a may be a macro BS for amacro cell 102 a, a BS 110 b may be a pico BS for a pico cell 102 b, anda BS 110 c may be a femto BS for a femto cell 102 c. ABS may support oneor multiple (e.g., three) cells. The terms “eNB”, “base station”, “NRBS”, “gNB”, “TRP”, “AP”, “node B”, “5G NB”, and “cell” may be usedinterchangeably herein.

In some aspects, a cell may not necessarily be stationary, and thegeographic area of the cell may move according to the location of amobile BS. In some aspects, the BSs may be interconnected to one anotherand/or to one or more other BSs or network nodes (not shown) in theaccess network 100 through various types of backhaul interfaces such asa direct physical connection, a virtual network, and/or the like usingany suitable transport network.

Wireless network 100 may also include relay stations. A relay station isan entity that can receive a transmission of data from an upstreamstation (e.g., a BS or a UE) and send a transmission of the data to adownstream station (e.g., a UE or a BS). A relay station may also be aUE that can relay transmissions for other UEs. In the example shown inFIG. 1, a relay station 110 d may communicate with macro BS 110 a and aUE 120 d in order to facilitate communication between BS 110 a and UE120 d. A relay station may also be referred to as a relay BS, a relaybase station, a relay, and/or the like.

Wireless network 100 may be a heterogeneous network that includes BSs ofdifferent types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, and/orthe like. These different types of BSs may have different transmit powerlevels, different coverage areas, and different impact on interferencein wireless network 100. For example, macro BSs may have a high transmitpower level (e.g., 5 to 40 Watts) whereas pico BSs, femto BSs, and relayBSs may have lower transmit power levels (e.g., 0.1 to 2 Watts).

A network controller 130 may couple to a set of BSs and may providecoordination and control for these BSs. Network controller 130 maycommunicate with the BSs via a backhaul. The BSs may also communicatewith one another, e.g., directly or indirectly via a wireless orwireline backhaul.

UEs 120 (e.g., 120 a, 120 b, 120 c) may be dispersed throughout wirelessnetwork 100, and each UE may be stationary or mobile. A UE may also bereferred to as an access terminal, a terminal, a mobile station, asubscriber unit, a station, and/or the like. A UE may be a cellularphone (e.g., a smart phone), a personal digital assistant (PDA), awireless modem, a wireless communication device, a handheld device, alaptop computer, a cordless phone, a wireless local loop (WLL) station,a tablet, a camera, a gaming device, a netbook, a smartbook, anultrabook, medical device or equipment, biometric sensors/devices,wearable devices (smart watches, smart clothing, smart glasses, smartwrist bands, smart jewelry (e.g., smart ring, smart bracelet)), anentertainment device (e.g., a music or video device, or a satelliteradio), a vehicular component or sensor, smart meters/sensors,industrial manufacturing equipment, a global positioning system device,or any other suitable device that is configured to communicate via awireless or wired medium.

Some UEs may be considered machine-type communication (MTC) or evolvedor enhanced machine-type communication (eMTC) UEs. MTC and eMTC UEsinclude, for example, robots, drones, remote devices, such as sensors,meters, monitors, location tags, and/or the like, that may communicatewith a base station, another device (e.g., remote device), or some otherentity. A wireless node may provide, for example, connectivity for or toa network (e.g., a wide area network such as Internet or a cellularnetwork) via a wired or wireless communication link. Some UEs may beconsidered Internet-of-Things (IoT) devices, and/or may be implementedas may be implemented as NB-IoT (narrowband internet of things) devices.Some UEs may be considered a Customer Premises Equipment (CPE). UE 120may be included inside a housing that houses components of UE 120, suchas processor components, memory components, and/or the like.

In general, any number of wireless networks may be deployed in a givengeographic area. Each wireless network may support a particular RAT andmay operate on one or more frequencies. A RAT may also be referred to asa radio technology, an air interface, and/or the like. A frequency mayalso be referred to as a carrier, a frequency channel, and/or the like.Each frequency may support a single RAT in a given geographic area inorder to avoid interference between wireless networks of different RATs.In some cases, NR or 5G RAT networks may be deployed.

In some aspects, two or more UEs 120 (e.g., shown as UE 120 a and UE 120e) may communicate directly using one or more sidelink channels (e.g.,without using a base station 110 as an intermediary to communicate withone another). For example, the UEs 120 may communicate usingpeer-to-peer (P2P) communications, device-to-device (D2D)communications, a vehicle-to-everything (V2X) protocol (e.g., which mayinclude a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure(V2I) protocol, and/or the like), a mesh network, and/or the like. Inthis case, the UE 120 may perform scheduling operations, resourceselection operations, and/or other operations described elsewhere hereinas being performed by the base station 110.

As indicated above, FIG. 1 is provided merely as an example. Otherexamples are possible and may differ from what was described with regardto FIG. 1.

FIG. 2 shows a block diagram of a design 200 of base station 110 and UE120, which may be one of the base stations and one of the UEs in FIG. 1.Base station 110 may be equipped with T antennas 234 a through 234 t,and UE 120 may be equipped with R antennas 252 a through 252 r, where ingeneral T≥1 and R≥1.

At base station 110, a transmit processor 220 may receive data from adata source 212 for one or more UEs, select one or more modulation andcoding schemes (MCS) for each UE based at least in part on channelquality indicators (CQIs) received from the UE, process (e.g., encodeand modulate) the data for each UE based at least in part on the MCS(s)selected for the UE, and provide data symbols for all UEs. Transmitprocessor 220 may also process system information (e.g., for semi-staticresource partitioning information (SRPI) and/or the like) and controlinformation (e.g., CQI requests, grants, upper layer signaling, and/orthe like) and provide overhead symbols and control symbols. Transmitprocessor 220 may also generate reference symbols for reference signals(e.g., the cell-specific reference signal (CRS)) and synchronizationsignals (e.g., the primary synchronization signal (PSS) and secondarysynchronization signal (SSS)). A transmit (TX) multiple-inputmultiple-output (MIMO) processor 230 may perform spatial processing(e.g., precoding) on the data symbols, the control symbols, the overheadsymbols, and/or the reference symbols, if applicable, and may provide Toutput symbol streams to T modulators (MODs) 232 a through 232 t. Eachmodulator 232 may process a respective output symbol stream (e.g., forOFDM and/or the like) to obtain an output sample stream. Each modulator232 may further process (e.g., convert to analog, amplify, filter, andupconvert) the output sample stream to obtain a downlink signal. Tdownlink signals from modulators 232 a through 232 t may be transmittedvia T antennas 234 a through 234 t, respectively. According to variousaspects described in more detail below, the synchronization signals canbe generated with location encoding to convey additional information.

At UE 120, antennas 252 a through 252 r may receive the downlink signalsfrom base station 110 and/or other base stations and may providereceived signals to demodulators (DEMODs) 254 a through 254 r,respectively. Each demodulator 254 may condition (e.g., filter, amplify,downconvert, and digitize) a received signal to obtain input samples.Each demodulator 254 may further process the input samples (e.g., forOFDM and/or the like) to obtain received symbols. A MIMO detector 256may obtain received symbols from all R demodulators 254 a through 254 r,perform MIMO detection on the received symbols if applicable, andprovide detected symbols. A receive processor 258 may process (e.g.,demodulate and decode) the detected symbols, provide decoded data for UE120 to a data sink 260, and provide decoded control information andsystem information to a controller/processor 280. A channel processormay determine reference signal received power (RSRP), received signalstrength indicator (RSSI), reference signal received quality (RSRQ),channel quality indicator (CQI), and/or the like.

On the uplink, at UE 120, a transmit processor 264 may receive andprocess data from a data source 262 and control information (e.g., forreports comprising RSRP, RSSI, RSRQ, CQI, and/or the like) fromcontroller/processor 280. Transmit processor 264 may also generatereference symbols for one or more reference signals. The symbols fromtransmit processor 264 may be precoded by a TX MIMO processor 266 ifapplicable, further processed by modulators 254 a through 254 r (e.g.,for DFT-s-OFDM, CP-OFDM, and/or the like), and transmitted to basestation 110. At base station 110, the uplink signals from UE 120 andother UEs may be received by antennas 234, processed by demodulators232, detected by a MIMO detector 236 if applicable, and furtherprocessed by a receive processor 238 to obtain decoded data and controlinformation sent by UE 120. Receive processor 238 may provide thedecoded data to a data sink 239 and the decoded control information tocontroller/processor 240. Base station 110 may include communicationunit 244 and communicate to network controller 130 via communicationunit 244. Network controller 130 may include communication unit 294,controller/processor 290, and memory 292.

In some aspects, one or more components of UE 120 may be included in ahousing. Controller/processor 240 of base station 110,controller/processor 280 of UE 120, and/or any other component(s) ofFIG. 2 may perform one or more techniques associated with power controlfor concurrent transmissions, as described in more detail elsewhereherein. For example, controller/processor 240 of base station 110,controller/processor 280 of UE 120, and/or any other component(s) ofFIG. 2 may perform or direct operations of, for example, process 900 ofFIG. 9 and/or other processes as described herein. Memories 242 and 282may store data and program codes for base station 110 and UE 120,respectively. A scheduler 246 may schedule UEs for data transmission onthe downlink and/or uplink.

In some aspects, UE 120 may include means for determining, when incommunication with a plurality of other wireless nodes via a pluralityof links of a network, a plurality of transmit powers for the pluralityof links, means for transmitting, using the plurality of transmit powersfor the plurality of links, information, to the plurality of otherwireless nodes, concurrently, based at least in part on determining theplurality of transmit powers for the plurality of links, and/or thelike. In some aspects, such means may include one or more components ofUE 120 described in connection with FIG. 2.

In some aspects, base station 110 may include means for determining,when in communication with a plurality of other wireless nodes via aplurality of links of a network, a plurality of transmit powers for theplurality of links, means for transmitting, using the plurality oftransmit powers for the plurality of links, information, to theplurality of other wireless nodes, concurrently, based at least in parton determining the plurality of transmit powers for the plurality oflinks, and/or the like. In some aspects, such means may include one ormore components of base station 110 described in connection with FIG. 2.

As indicated above, FIG. 2 is provided merely as an example. Otherexamples are possible and may differ from what was described with regardto FIG. 2.

FIG. 3A shows an example frame structure 300 for frequency divisionduplexing (FDD) in a telecommunications system (e.g., NR). Thetransmission timeline for each of the downlink and uplink may bepartitioned into units of radio frames (sometimes referred to asframes). Each radio frame may have a predetermined duration (e.g., 10milliseconds (ms)) and may be partitioned into a set of Z (Z≥1)subframes (e.g., with indices of 0 through Z−1). Each subframe may havea predetermined duration (e.g., 1 ms) and may include a set of slots(e.g., 2^(m) slots per subframe are shown in FIG. 3A, where m is anumerology used for a transmission, such as 0, 1, 2, 3, 4, and/or thelike). Each slot may include a set of L symbol periods. For example,each slot may include fourteen symbol periods (e.g., as shown in FIG.3A), seven symbol periods, or another number of symbol periods. In acase where the subframe includes two slots (e.g., when m=1), thesubframe may include 2L symbol periods, where the 2L symbol periods ineach subframe may be assigned indices of 0 through 2L−1. In someaspects, a scheduling unit for the FDD may frame-based, subframe-based,slot-based, symbol-based, and/or the like.

While some techniques are described herein in connection with frames,subframes, slots, and/or the like, these techniques may equally apply toother types of wireless communication structures, which may be referredto using terms other than “frame,” “subframe,” “slot,” and/or the likein 5G NR. In some aspects, a wireless communication structure may referto a periodic time-bounded communication unit defined by a wirelesscommunication standard and/or protocol. Additionally, or alternatively,different configurations of wireless communication structures than thoseshown in FIG. 3A may be used.

In certain telecommunications (e.g., NR), a base station may transmitsynchronization signals. For example, a base station may transmit aprimary synchronization signal (PSS), a secondary synchronization signal(SSS), and/or the like, on the downlink for each cell supported by thebase station. The PSS and SSS may be used by UEs for cell search andacquisition. For example, the PSS may be used by UEs to determine symboltiming, and the SSS may be used by UEs to determine a physical cellidentifier, associated with the base station, and frame timing. The basestation may also transmit a physical broadcast channel (PBCH). The PBCHmay carry some system information, such as system information thatsupports initial access by UEs.

In some aspects, the base station may transmit the PSS, the SSS, and/orthe PBCH in accordance with a synchronization communication hierarchy(e.g., a synchronization signal (SS) hierarchy) including multiplesynchronization communications (e.g., SS blocks), as described below inconnection with FIG. 3B.

FIG. 3B is a block diagram conceptually illustrating an example SShierarchy, which is an example of a synchronization communicationhierarchy. As shown in FIG. 3B, the SS hierarchy may include an SS burstset, which may include a plurality of SS bursts (identified as SS burst0 through SS burst B−1, where B is a maximum number of repetitions ofthe SS burst that may be transmitted by the base station). As furthershown, each SS burst may include one or more SS blocks (identified as SSblock 0 through SS block (b_(max) _(_) _(SS-1)), where b_(max) _(_)_(SS-1) is a maximum number of SS blocks that can be carried by an SSburst). In some aspects, different SS blocks may be beam-formeddifferently. An SS burst set may be periodically transmitted by awireless node, such as every X milliseconds, as shown in FIG. 3B. Insome aspects, an SS burst set may have a fixed or dynamic length, shownas Y milliseconds in FIG. 3B.

The SS burst set shown in FIG. 3B is an example of a synchronizationcommunication set, and other synchronization communication sets may beused in connection with the techniques described herein. Furthermore,the SS block shown in FIG. 3B is an example of a synchronizationcommunication, and other synchronization communications may be used inconnection with the techniques described herein.

In some aspects, an SS block includes resources that carry the PSS, theSSS, the PBCH, and/or other synchronization signals (e.g., a tertiarysynchronization signal (TSS)) and/or synchronization channels. In someaspects, multiple SS blocks are included in an SS burst, and the PSS,the SSS, and/or the PBCH may be the same across each SS block of the SSburst. In some aspects, a single SS block may be included in an SSburst. In some aspects, the SS block may be at least four symbol periodsin length, where each symbol carries one or more of the PSS (e.g.,occupying one symbol), the SSS (e.g., occupying one symbol), and/or thePBCH (e.g., occupying two symbols).

In some aspects, a synchronization communication (e.g., an SS block) mayinclude a base station synchronization communication for transmission,which may be referred to as a Tx BS-SS, a Tx gNB-SS, and/or the like. Insome aspects, a synchronization communication (e.g., an SS block) mayinclude a base station synchronization communication for reception,which may be referred to as an Rx BS-SS, an Rx gNB-SS, and/or the like.In some aspects, a synchronization communication (e.g., an SS block) mayinclude a user equipment synchronization communication for transmission,which may be referred to as a Tx UE-SS, a Tx NR-SS, and/or the like. Abase station synchronization communication (e.g., for transmission by afirst base station and reception by a second base station) may beconfigured for synchronization between base stations, and a userequipment synchronization communication (e.g., for transmission by abase station and reception by a user equipment) may be configured forsynchronization between a base station and a user equipment.

In some aspects, a base station synchronization communication mayinclude different information than a user equipment synchronizationcommunication. For example, one or more base stations synchronizationcommunications may exclude PBCH communications. Additionally, oralternatively, a base station synchronization communication and a userequipment synchronization communication may differ with respect to oneor more of a time resource used for transmission or reception of thesynchronization communication, a frequency resource used fortransmission or reception of the synchronization communication, aperiodicity of the synchronization communication, a waveform of thesynchronization communication, a beamforming parameter used fortransmission or reception of the synchronization communication, and/orthe like.

In some aspects, the symbols of an SS block are consecutive, as shown inFIG. 3B. In some aspects, the symbols of an SS block arenon-consecutive. Similarly, in some aspects, one or more SS blocks ofthe SS burst may be transmitted in consecutive radio resources (e.g.,consecutive symbol periods) during one or more subframes. Additionally,or alternatively, one or more SS blocks of the SS burst may betransmitted in non-consecutive radio resources.

In some aspects, the SS bursts may have a burst period, whereby the SSblocks of the SS burst are transmitted by the base station according tothe burst period. In other words, the SS blocks may be repeated duringeach SS burst. In some aspects, the SS burst set may have a burst setperiodicity, whereby the SS bursts of the SS burst set are transmittedby the base station according to the fixed burst set periodicity. Inother words, the SS bursts may be repeated during each SS burst set.

The base station may transmit system information, such as systeminformation blocks (SIBs) on a physical downlink shared channel (PDSCH)in certain subframes. The base station may transmit controlinformation/data on a physical downlink control channel (PDCCH) in Csymbol periods of a subframe, where B may be configurable for eachsubframe. The base station may transmit traffic data and/or other dataon the PDSCH in the remaining symbol periods of each subframe.

As indicated above, FIGS. 3A and 3B are provided as examples. Otherexamples are possible and may differ from what was described with regardto FIGS. 3A and 3B.

FIG. 4 shows an example subframe format 410 with a normal cyclic prefix.The available time frequency resources may be partitioned into resourceblocks. Each resource block may cover a set to of subcarriers (e.g., 12subcarriers) in one slot and may include a number of resource elements.Each resource element may cover one subcarrier in one symbol period(e.g., in time) and may be used to send one modulation symbol, which maybe a real or complex value. In some aspects, subframe format 410 may beused for transmission of SS blocks that carry the PSS, the SSS, thePBCH, and/or the like, as described herein.

An interlace structure may be used for each of the downlink and uplinkfor FDD in certain telecommunications systems (e.g., NR). For example, Qinterlaces with indices of 0 through Q−1 may be defined, where Q may beequal to 4, 6, 8, 10, or some other value. Each interlace may includesubframes that are spaced apart by Q frames. In particular, interlace qmay include subframes q, q+Q, q+2Q, etc., where q∈{0, . . . , Q−1}.

A UE may be located within the coverage of multiple BSs. One of theseBSs may be selected to serve the UE. The serving BS may be selectedbased at least in part on various criteria such as received signalstrength, received signal quality, path loss, and/or the like. Receivedsignal quality may be quantified by a signal-to-noise-and-interferenceratio (SINR), or a reference signal received quality (RSRQ), or someother metric. The UE may operate in a dominant interference scenario inwhich the UE may observe high interference from one or more interferingBSs.

While aspects of the examples described herein may be associated with NRor 5G technologies, aspects of the present disclosure may be applicablewith other wireless communication systems. New radio (NR) may refer toradios configured to operate according to a new air interface (e.g.,other than Orthogonal Frequency Divisional Multiple Access (OFDMA)-basedair interfaces) or fixed transport layer (e.g., other than InternetProtocol (IP)). In aspects, NR may utilize OFDM with a CP (hereinreferred to as cyclic prefix OFDM or CP-OFDM) and/or SC-FDM on theuplink, may utilize CP-OFDM on the downlink and include support forhalf-duplex operation using time division duplexing (TDD). In aspects,NR may, for example, utilize OFDM with a CP (herein referred to asCP-OFDM) and/or discrete Fourier transform spread orthogonalfrequency-division multiplexing (DFT-s-OFDM) on the uplink, may utilizeCP-OFDM on the downlink and include support for half-duplex operationusing TDD. NR may include Enhanced Mobile Broadband (eMBB) servicetargeting wide bandwidth (e.g., 80 megahertz (MHz) and beyond),millimeter wave (mmW) targeting high carrier frequency (e.g., 60gigahertz (GHz)), massive MTC (mMTC) targeting non-backward compatibleMTC techniques, and/or mission critical targeting ultra reliable lowlatency communications (URLLC) service.

In some aspects, a single component carrier bandwidth of 100 MHZ may besupported. NR resource blocks may span 12 sub-carriers with asub-carrier bandwidth of 60 or 120 kilohertz (kHz) over a 0.1millisecond (ms) duration. Each radio frame may include 40 subframeswith a length of 10 ms. Consequently, each subframe may have a length of0.25 ms. Each subframe may indicate a link direction (e.g., DL or UL)for data transmission and the link direction for each subframe may bedynamically switched. Each subframe may include DL/UL data as well asDL/UL control data.

Beamforming may be supported and beam direction may be dynamicallyconfigured. MIMO transmissions with precoding may also be supported.MIMO configurations in the DL may support up to 8 transmit antennas withmulti-layer DL transmissions up to 8 streams and up to 2 streams per UE.Multi-layer transmissions with up to 2 streams per UE may be supported.Aggregation of multiple cells may be supported with up to 8 servingcells. Alternatively, NR may support a different air interface, otherthan an OFDM-based interface. NR networks may include entities suchcentral units or distributed units.

As indicated above, FIG. 4 is provided as an example. Other examples arepossible and may differ from what was described with regard to FIG. 4.

FIG. 5 illustrates an example logical architecture of a distributed RAN500, according to aspects of the present disclosure. A 5G access node506 may include an access node controller (ANC) 502. The ANC may be acentral unit (CU) of the distributed RAN 500. The backhaul interface tothe next generation core network (NG-CN) 504 may terminate at the ANC.The backhaul interface to neighboring next generation access nodes(NG-ANs) may terminate at the ANC. The ANC may include one or more TRPs508 (which may also be referred to as BSs, NR BSs, Node Bs, 5G NBs, APs,gNB, or some other term). As described above, a TRP may be usedinterchangeably with “cell.”

The TRPs 508 may be a distributed unit (DU). The TRPs may be connectedto one ANC (ANC 502) or more than one ANC (not illustrated). Forexample, for RAN sharing, radio as a service (RaaS), and servicespecific AND deployments, the TRP may be connected to more than one ANC.A TRP may include one or more antenna ports. The TRPs may be configuredto individually (e.g., dynamic selection) or jointly (e.g., jointtransmission) serve traffic to a UE.

The local architecture of RAN 500 may be used to illustrate fronthauldefinition. The architecture may be defined that support fronthaulingsolutions across different deployment types. For example, thearchitecture may be based at least in part on transmit networkcapabilities (e.g., bandwidth, latency, and/or jitter).

The architecture may share features and/or components with LTE.According to aspects, the next generation AN (NG-AN) 510 may supportdual connectivity with NR. The NG-AN may share a common fronthaul forLTE and NR.

The architecture may enable cooperation between and among TRPs 508. Forexample, cooperation may be preset within a TRP and/or across TRPs viathe ANC 502. According to aspects, no inter-TRP interface may beneeded/present.

According to aspects, a dynamic configuration of split logical functionsmay be present within the architecture of RAN 500. The packet dataconvergence protocol (PDCP), radio link control (RLC), media accesscontrol (MAC) protocol may be adaptably placed at the ANC or TRP.

According to various aspects, a BS may include a central unit (CU)(e.g., ANC 502) and/or one or more distributed units (e.g., one or moreTRPs 508).

As indicated above, FIG. 5 is provided merely as an example. Otherexamples are possible and may differ from what was described with regardto FIG. 5.

FIG. 6 illustrates an example physical architecture of a distributed RAN600, according to aspects of the present disclosure. A centralized corenetwork unit (C-CU) 602 may host core network functions. The C-CU may becentrally deployed. C-CU functionality may be offloaded (e.g., toadvanced wireless services (AWS)), in an effort to handle peak capacity.

A centralized RAN unit (C-RU) 604 may host one or more ANC functions.Optionally, the C-RU may host core network functions locally. The C-RUmay have distributed deployment. The C-RU may be closer to the networkedge.

A distributed unit (DU) 606 may host one or more TRPs. The DU may belocated at edges of the network with radio frequency (RF) functionality.

As indicated above, FIG. 6 is provided merely as an example. Otherexamples are possible and may differ from what was described with regardto FIG. 6.

FIGS. 7A and 7B are diagrams illustrating an example 700 of a networktopology for a network, in accordance with various aspects of thepresent disclosure. Self-backhauling or integrated access/backhaul (IAB)may be deployed to use a common set of resources for access traffic andbackhaul traffic. For example, a first wireless node (e.g., a BS 110, aUE 120, and/or the like) may communicate backhaul traffic via firstmmWave resources with a second wireless node, and may communicate accesstraffic via second mmWave resources with a third wireless node.

As shown in FIG. 7A, example 700 may include multiple wireless nodes 702(e.g., BSs) and multiple wireless nodes 704 (e.g., UEs). At least onewireless node (e.g., wireless node 702-1) may communicate with a corenetwork via a backhaul link 706, such as a fiber connection, a wirelessbackhaul connection, and/or the like. Wireless nodes 702 and 704 maycommunicate with each other using a set of links 708, such as a set ofmmWave links; a 3G, 4G, 5G, etc. air interface; and/or the like. In someaspects, a wireless node 702 may correspond to BS 110 or UE 120 shown inFIG. 1. Similarly, a wireless node 704 may correspond to BS 110 or a UE120 shown in FIG. 1.

As further shown in FIG. 7A, one or more wireless nodes 702 or 704 maycommunicate indirectly via one or more other wireless nodes 702 or 704.For example, data may be transferred from a core network to wirelessnode 704-6 via backhaul link 706, a link 708 between wireless node 702-1and wireless node 702-5, a link 708 between wireless node 702-5 andwireless node 702-4, a link 708 between wireless node 702-4 and wirelessnode 704-5, and a link 708 between wireless node 704-5 and wireless node704-6. In some aspects, multiple different paths may be used tocommunicate data between wireless nodes 702 or 704. For example,wireless node 702-5 may communicate with wireless node 702-4 via asingle link 708 between wireless node 702-5 and wireless node 702-4(e.g., a direct link) and/or via a first link 708 between wireless node702-5 and wireless node 702-3 and a second link between wireless node702-3 and wireless node 702-4 (e.g., an indirect link).

As shown in FIG. 7B, wireless nodes 702 and wireless nodes 704 can bearranged in a hierarchical topology to enable management of networkresources. Each link 708 may be associated with a master link end point(master LEP) and a slave link end point (slave LEP), which may define ahierarchy between wireless nodes 702 or 704. For example, wireless node702-6 may communicate with wireless node 702-7 via link 708-1. In thiscase, wireless node 702-6 is associated with a master link end point andwireless node 702-7 is associated with a slave link end point for link708-1, which may define wireless node 702-6 as hierarchically superiorto wireless node 702-7, and wireless node 702-7 as hierarchicallyinferior to wireless node 702-6 with regard to link 708-1. Moreover,wireless node 702-6 may be defined as upstream relative to wireless node702-7 (and wireless node 702-7 may be defined as downstream relative towireless node 702-6).

Similarly, wireless node 702-7 includes a master link end point for link708-2 and wireless node 702-8 includes a slave link end point forbackhaul link 708-2. In this case, wireless node 702-7 is hierarchicallysuperior and upstream to wireless node 702-8, and wireless node 702-8 ishierarchically inferior and downstream to wireless node 702-7 withregard to link 708-2. In some aspects, a wireless node 702 or 704 mayinclude a single antenna or antenna array for both the slave link endpoint and master link end point. In some aspects, a wireless node 702 or704 may include a first antenna or antenna array for the slave link endpoint and a second antenna or antenna array for the master link endpoint.

In some aspects, wireless node 702-6, or a central unit, may be referredto herein as an IAB-donor. The IAB-donor may be the RAN node thatprovides the UE's interface to the core network and that provideswireless backhauling functionality to IAB nodes. Wireless nodes 702-7,702-8, and so on may be referred to as IAB nodes. An IAB node may beassociated with a mobile terminal (MT), which may act as a UE for theparent IAB node of the IAB node or for the IAB-donor. An IAB node mayalso be associated with a DU or gNB, which may function as a basestation (e.g., a gNB, a gNB-DU with a MAC scheduler, etc.) for childnodes of the IAB node.

As indicated above, FIGS. 7A and 7B are provided as examples. Otherexamples are possible and may differ from what was described withrespect to FIGS. 7A and 7B.

An upstream wireless node may determine a transmission power fortransmissions to each downstream wireless node. Similarly, the upstreamwireless node may determine a transmission power for transmission fromeach downstream node (e.g., transmission to the upstream node, tosubsequent downstream nodes, and/or the like). However, in some networktopologies, a downstream wireless node may experience inter-linkinterference when transmitting a plurality of transmissions via aplurality of links, such as to a plurality of upstream nodes, to anupstream node and a downstream node, to a plurality of downstream nodes,and/or the like. Moreover, the downstream wireless node may beassociated with a threshold maximum transmit power, and may receive aninstruction from a plurality of upstream wireless nodes that is to causethe downstream wireless node to exceed the threshold maximum transmitpower.

Some aspects, described herein, may enable transmit power control forconcurrent transmissions. For example, a wireless node may determine aplurality of transmit powers for a plurality of transmissions via aplurality of links to a plurality of other wireless nodes, such that theplurality of transmit powers are selected to control inter-linkinterference and/or to satisfy a maximum transmit power criterion. Inthis case, the wireless node may transmit the plurality of transmissionsvia the plurality of links using the plurality of transmit powers. Inthis way, the wireless node enables communications for a particularnetwork topology, such as in a self-backhauling network, an IAB network,and/or the like.

FIGS. 8A and 8B are diagrams illustrating an example 800 of powercontrol for concurrent transmissions, in accordance with various aspectsof the present disclosure. As shown in FIGS. 8A and 8B, example 800 mayinclude a first wireless node 805, which may be in communication with asecond wireless node 805 via a first link 810 and in communication witha third wireless node 805 via a second link 810. In some aspects,wireless nodes 805 may correspond to BS 110, UE 120, wireless node 702,wireless node 704, and/or the like. In some aspects, links 810 maycorrespond to links 708.

With regard to FIG. 8A, first wireless node 805 may be downstream ofboth second wireless node 805 and third wireless node 805. For example,first wireless node 805 may be a user equipment (UE-F), and secondwireless node 805 and third wireless node 805 may be access nodes(ANFs). In contrast, with regard to FIG. 8B, first wireless node 805 maybe downstream of second wireless node 805 and upstream of third wirelessnode 805. For example, second wireless node 805 may be an ANF of firstwireless node 805, which may be a UE-F of second wireless node 805, andfirst wireless node 805 may be an ANF of third wireless node 805, whichmay be a UE-F of second wireless node 805. In this case, first wirelessnode 805 may be a relay node. In some aspects, first wireless node 805may support concurrent communication with second wireless node 805 andthird wireless node 805 (e.g., using FDM, space division multiplexing(SDM), multiple user MIMO (MU-MIMO), and/or the like).

In some aspects, a wireless node 805 may schedule communications on alink 810. For example, with regard to FIG. 8A, second wireless node 805may schedule communications on first link 810 and third wireless node805 may schedule communications on second link 810. In contrast, withregard to FIG. 8B, second wireless node 805 may schedule communicationson first link 810 and first wireless node 805 may schedulecommunications on second link 810. Although aspects, described herein,are described in terms of a first wireless node 805, a second wirelessnode 805, and a third wireless node 805, other quantities of wirelessnodes 805, arrangements of wireless nodes 805, and/or the like arepossible.

As shown in FIGS. 8A and 8B, and by reference number 815, first wirelessnode 805 may determine a plurality of transmit powers for links 810. Forexample, first wireless node 805 may determine a first transmit powerfor first link 810 and a second transmit power for second link 810. Insome aspects, first wireless node 805 may select the plurality oftransmit powers for links 810 to control inter-link interference. Forexample, first wireless node 805 may select the plurality of transmitpowers to ensure that a transmission to second wireless node 805 doesnot interfere with another transmission to third wireless node 805. Insome aspects, first wireless node 805 may select the plurality oftransmit powers for links 810 to satisfy a maximum transmit powercriterion. For example, when first wireless node 805 is to use a singleantenna or antenna array associated with a threshold maximum transmitpower for concurrent transmissions to second wireless node 805 and thirdwireless node 805, first wireless node 805 may select the plurality oftransmit powers to share portions of available transmit power such thatthe threshold maximum transmit power is not exceeded.

In some aspects, first wireless node 805 may statically determine theplurality of transmit powers. For example, at a particular time, firstwireless node 805 may be triggered to determine the plurality oftransmit powers, such as at an initial configuration time, when aconnection to second wireless device and/or third wireless node 805 isestablished, and/or the like. In this case, first wireless node 805 maydetermine the plurality of transmit powers and configure the pluralityof transmit powers for subsequent use.

In some aspects, first wireless node 805 may dynamically determine theplurality of transmit powers. For example, first wireless node 805 may,after determining a first plurality of transmit powers at a first time,determine a second plurality of transmit powers at a second time, suchas based at least in part on a change to a network configuration, achange to a network characteristic (e.g., a signal to interference noiseratio or another network characteristic), and/or the like. In someaspects, first wireless node 805 may determine a minimum-guaranteedtransmit power for a transmit power of the plurality of transmit powers,a maximum transmit power, and/or the like, and may dynamically determinethe plurality of transmit powers to determine that theminimum-guaranteed transmit power is exceeded, the maximum transmitpower is not exceeded, and/or the like, such as for downstreamtransmission, upstream transmission, and/or the like. In some aspects,first wireless node 805 may signal and/or receive a signal identifyingthe minimum-guaranteed transmit power, maximum transmit power, and/orthe like. In some aspects, first wireless node 805 may allocate a subsetof transmit powers based at least in part on a prioritization and/or arelative scaling such that a minimum guaranteed power is allocated foreach link to each ANF (e.g., second wireless node 805, third wirelessnode 805, and/or the like).

Additionally, or alternatively, first wireless node 805 may dynamicallydetermine a subset of the plurality of transmit powers. For example,first wireless node 805 may statically determine or semi-staticallydetermine a first transmit power (e.g., for first link 810), and maydynamically determine and update a second transmit power (e.g., forsecond link 810, another link 810, and/or the like). In some aspects,first wireless node 805 may select a determination configuration for atransmit power on a channel dependent or reference signal dependentbasis. For example, first wireless node 805 may determine to staticallydetermine the first transmit power based at least in part acharacteristic of first link 810, and may determine to dynamicallydetermine the second transmit power based at least in part on acharacteristic of second link 810.

In some aspects, first wireless node 805 may determine the plurality oftransmit powers based at least in part on received signaling. Forexample, first wireless node 805 may receive signaling from a centralunit (CU) of a network, another wireless node 805 of the network (e.g.,second wireless node 805, third wireless node 805, a group of wirelessnodes 805, which may include first wireless node, 805, second wirelessnode 805 or third wireless node 805, a control node, a scheduler node,and/or the like). In some aspects, the received signaling may includeinformation identifying the plurality of transmit powers. For example, acentral unit or control node may provide signaling to first wirelessnode 805, which may specify the plurality of transmit powers. In someaspects, first wireless node 805 may receive signaling from a parentwireless node 805 (e.g., second wireless node 805) controlling atransmit power for an uplink transmission (e.g., via first link 810),and may determine a transmit power for a downlink transmission (e.g.,via second link 810 to third wireless node 805) based at least in parton the signaling. In some aspects, first wireless node 805 and secondwireless node 805 may dynamically share power for first link 810 andsecond link 810 based at least in part on a prioritization rule (e.g.,relating to a type of signal, a type of channel, a minimum transmitpower threshold, and/or the like). In this case, second wireless node805 may provide feedback information to first wireless node 805 and/orfirst wireless node 805 may provide feedback information to secondwireless node 805 to coordinate transmit powers for concurrent uplinktransmission on first link 810 and downlink transmission on second link810.

Additionally, or alternatively, the received signaling may includeinformation relating to the plurality of transmit powers. For example, ascheduler node, second wireless node 805, third wireless node 805,and/or the like may provide information identifying a schedule fortransmissions, and first wireless node 805 may determine the pluralityof transmit powers based at least in part on the schedule fortransmissions. In some aspects, the received signaling may be upperlayer signaling, such as signaling from a device associated withcontrolling and/or configuring the network.

In some aspects, first wireless node 805 may determine the plurality oftransmit powers based at least in part on stored configurationinformation. For example, first wireless node 805 may store staticconfiguration information associated with identifying transmit powersfor a plurality of transmissions, and may determine the plurality oftransmit powers based at least in part on the stored staticconfiguration information.

In some aspects, first wireless node 805 may provide signaling relatingto the plurality of transmit powers. For example, first wireless node805 may provide signaling to a scheduler node, a central unit, secondwireless node 805, third wireless node 805, an upper layer of thenetwork (e.g., a device associated with network control, scheduling,and/or configuration), and/or the like to identify a parameter relatingto the transmit power, such as a parameter identifying the maximumtransmit power criterion to enable. In this case, the plurality oftransmit powers may be determined based at least in part on, forexample, the maximum transmit power criterion, and first wireless node805 may receive signaling identifying the plurality of transmit powers.

Additionally, or alternatively, first wireless node 805 may providesignaling identifying the plurality of transmit powers. For example,first wireless node 805 may identify a transmit power to anotherwireless node 805 to enable the other wireless node 805 to selectanother transmit power for another transmission to avoid inter-linkinterference between the transmission and the other transmission. Insome aspects, second wireless node 805 may be designated as a primaryANF, and may determine the plurality of transmit powers and providesignaling to first wireless node 805 relating to the plurality oftransmit powers based at least in part on being designated as a primaryANF.

In some aspects, first wireless node 805 may receive and/or providesignaling identifying a configuration parameter, a request forinformation identifying the configuration parameter, an approval of theconfiguration parameter, a disapproval of the configuration parameter, ameasurement, a capability indication, a limitation indication, aschedule, and/or the like. For example, a central unit may request ameasurement of a network or an indication of an amount of data fortransmission from first wireless node 805, receive a response to therequest, determine a plurality of transmit powers for first wirelessnode 805 based at least in part on the response and a schedule for firstwireless node 805, provide a configuration parameter identifying theplurality of transmit powers, and receive an approval message approvingof the configuration parameter.

In some aspects, first wireless node 805 and/or another device maydetermine the plurality of transmit powers based at least in part on acharacteristic of the network, a device in the network, traffic beingcommunicated via the network, and/or the like. For example, firstwireless node 805 may determine the plurality of transmit powers basedat least in part on a type of signal for transmission, a type of awireless node (e.g., of first wireless node 805, second wireless node805, third wireless node 805, and/or the like), a state of a wirelessnode (e.g., of first wireless node 805, second wireless node 805, thirdwireless node 805, and/or the like), a timing of the signal, acapability of a wireless node (e.g., first wireless node 805, secondwireless node 805, third wireless node 805, and/or the like) an angulardirection of the signal, and/or the like.

In some aspects, first wireless node 805 may determine the plurality oftransmit powers based at least in part on a prioritization. For example,first wireless node 805 may determine that a control signal is to beassociated with a higher prioritization than a payload signal; ascheduling request is to be associated with a higher priority than achannel state information signal, a data signal, and a soundingreference signal; and/or the like. Additionally, or alternatively, firstwireless node 805 may determine a prioritization in assigning portionsof available transmit power based at least in part on whether a wirelessnode 805 is included in a master cell group, a secondary cell group, anupstream direction, a downstream direction, and/or the like. In someaspects, first wireless node 805 may scale a transmit power to determinethe plurality of transmit powers. For example, based at least in part onthe maximum transmit power and relative prioritizations relating tofirst link 810 and second wireless node 805 and to second link 810 andthird wireless node 805, first wireless node 805 may scale the maximumtransmit power to divide the maximum transmit power or to avoidinter-link interference.

In some aspects, the signaling relating to the transmit power may be aparticular type of signal. For example, first wireless node 805 mayreceive or provide a downlink control information (DCI) signal, anuplink control information (UCI) signal, a media access control (MAC)control element (CE) signal, a radio resource control (RRC) signal, amaster information block (MIB) signal, a system information block (SIB)signal, a reference signal (e.g., a synchronization signal, a beamreference signal, and/or the like), and/or the like to identify thetransmit power or information relating to the transmit power. In someaspects, the signaling may be an upper layer signaling signal, such asF1-AP signaling.

As further shown in FIGS. 8A and 8B, and by reference number 820, firstwireless node 805 may transmit using the plurality of transmit powers.For example, first wireless node 805 may transmit information to secondwireless node 805 via first link 810 using the first transmit power, andmay, concurrently, transmit information to third wireless node 805 viasecond link 810 using the second transmit power. In some aspects, firstwireless node 805 may transmit payload data using the plurality oftransmit powers. Additionally, or alternatively, first wireless node 805may transmit signaling data using the plurality of transmit powers. Insome aspects, first wireless node 805 may transmit reference signals.For example, when transmitting a plurality of concurrent referencesignals, such as using beam-sweeping, first wireless node 805 maydynamically adjust a transmit power for each reference signal based atleast in part on the plurality of transmit powers.

In some aspects, first wireless node 805 may transmit a relayed signalusing a transmit power of the plurality of transmit powers. For example,first wireless node 805 may be operating in a different frequency, RAT,cell, and/or the like from a direct link between second wireless node805 and third wireless node 805 to relay signals between second wirelessnode 805 and third wireless node 805 (e.g., an indirect link). In thiscase, first wireless node 805 may transmit a relayed signal using atransmit power of the plurality of transmit powers to enable redundantcommunications between second wireless node 805 and third wireless node805. In this case, first wireless node 805 may indicate to secondwireless node 805 or third wireless node 805 a transmit power forutilization in the direct link and/or may receive an indication of thetransmit power to select for the indirect link.

As indicated above, FIGS. 8A and 8B are provided as examples. Otherexamples are possible and may differ from what was described withrespect to FIGS. 8A and 8B.

FIG. 9 is a diagram illustrating an example process 900 performed, forexample, by a wireless node, in accordance with various aspects of thepresent disclosure. Example process 900 is an example where a wirelessnode (e.g., BS 110, UE 120, wireless node 702, wireless node 704,wireless node 805, and/or the like) performs power control forconcurrent transmissions.

As shown in FIG. 9, in some aspects, process 900 may includedetermining, when in communication with a plurality of other wirelessnodes via a plurality of links of a network, a plurality of transmitpowers for the plurality of links (block 910). For example, the wirelessnode (e.g., using controller/processor 240, controller/processor 280,and/or the like) may determine the plurality of transmit powers for theplurality of links, as described above.

As shown in FIG. 9, in some aspects, process 900 may includetransmitting, using the plurality of transmit powers for the pluralityof links, information, to the plurality of other wireless nodes,concurrently, based at least in part on determining the plurality oftransmit powers for the plurality of links (block 920). For example, thewireless node (e.g., using controller/processor 240, transmit processor220, TX MIMO processor 230, MOD 232, antenna 234, controller/processor280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna252, and/or the like) may concurrently transmit, to the plurality ofother wireless nodes and via the plurality of links, a plurality oftransmissions using the plurality of transmit powers, as describedabove.

Process 900 may include additional aspects, such as any single aspect orany combination of aspects described below and/or in connection with oneor more other processes described elsewhere herein.

In some aspects, the plurality of transmit powers are selected tocontrol inter-link interference or to satisfy a maximum transmit powercriterion. In some aspects, the wireless node is a first wireless nodeand the plurality of other wireless nodes includes a second wirelessnode communicating with the first wireless node using a first link ofthe plurality of links and a third wireless node communicating with thefirst wireless node using a second link of the plurality of links, andthe second wireless node is scheduling communications on the first linkand the first wireless node is scheduling communications on the secondlink.

In some aspects, the wireless node is a first wireless node and theplurality of other wireless nodes includes a second wireless nodecommunicating with the first wireless node using a first link of theplurality of links and a third wireless node communicating with thefirst wireless node using a second link of the plurality of links, andthe second wireless node is scheduling communications on the first linkand the third wireless node is scheduling communications on the secondlink. In some aspects, the plurality of transmit powers are selected toshare a plurality of portions of the maximum transmit power criterion ofthe wireless node. In some aspects, the plurality of transmit powers areselected to control inter-link interference.

In some aspects, the plurality of transmit powers are determined basedat least in part on received signaling from a central unit of thenetwork. In some aspects, the plurality of transmit powers arecontrolled by the wireless node. In some aspects, the plurality oftransmit powers are determined based at least in part on receivedsignaling from another wireless node of the plurality of other wirelessnodes. In some aspects, the plurality of transmit powers are determinedbased at least in part on a scheduler node for the wireless node.

In some aspects, the plurality of transmit powers are determined basedat least in part on received signaling from a group of wireless nodes,and the group of wireless nodes includes the wireless node, anotherwireless node of the plurality of other wireless nodes, a combinationthereof, and/or the like. In some aspects, the plurality of transmitpowers are determined based at least in part on stored informationidentifying a transmit power configuration. In some aspects, theplurality of transmit powers are determined based at least in part onupper layer signaling. In some aspects, the wireless node may transmitsignaling relating to a transmit power, of the plurality of transmitpowers, to another wireless node, a central unit, an upper layer of thenetwork, and/or the like.

In some aspects, signaling provided to the wireless node or by thewireless node, relating to a transmit power, of the plurality oftransmit powers, includes information identifying a configurationparameter, a request for information identifying the configurationparameter, an approval of the configuration parameter, a disapproval ofthe configuration parameter, a measurement, a capability indication, alimitation indication, a schedule, and/or the like. In some aspects,signaling provided to the wireless node or by the wireless node,relating to a transmit power, of the plurality of transmit powers, isprovided via a downlink control information signal, an uplink controlinformation signal, a media access control control element signal, aradio resource control signal, a master information block signal, asystem information block signal, a reference signal, a synchronizationsignal, an upper layer signaling signal, an F1-AP signal, a beamreference signal, and/or the like.

In some aspects, a transmit power, of the plurality of transmit powers,is statically determined. In some aspects, a transmit power, of theplurality of transmit powers, is dynamically determined. In someaspects, a first transmit power, of the plurality of transmit powers, isstatically determined or semi-statically determined, and a secondtransmit power, of the plurality of transmit powers, is dynamicallydetermined. In some aspects, a transmit power, of the plurality oftransmit powers, is determined based at least in part on a type ofsignal for transmission on a link of the plurality of links, a type ofthe wireless node, a type of another wireless node, a state of thewireless node, a state of the other wireless node, a timing of thesignal for transmission on the link of the plurality of links, acapability of at least one wireless node, an angular direction of thesignal for transmission on the link of the plurality of links, and/orthe like.

In some aspects, a first transmit power, of the plurality of transmitpowers, for a downlink transmission is determined semi-statically and asecond transmit power, of the plurality of transmit powers, for anuplink transmission, is determined based at least in part on informationidentifying the first transmit power, and the second transmit power iscontrolled by another wireless node. In some aspects, a first transmitpower, of the plurality of transmit powers, for a downlink transmissionis determined dynamically based at least in part on a power sharingprioritization rule and a feedback message associated with identifying asecond transmit power, of the plurality of transmit powers, for anuplink transmission, and the feedback message is provided by and thesecond transmit power is controlled by another wireless node.

Although FIG. 9 shows example blocks of process 900, in some aspects,process 900 may include additional blocks, fewer blocks, differentblocks, or differently arranged blocks than those depicted in FIG. 9.Additionally, or alternatively, two or more of the blocks of process 900may be performed in parallel.

The foregoing disclosure provides illustration and description, but isnot intended to be exhaustive or to limit the aspects to the preciseform disclosed. Modifications and variations are possible in light ofthe above disclosure or may be acquired from practice of the aspects.

As used herein, the term component is intended to be broadly construedas hardware, firmware, or a combination of hardware and software. Asused herein, a processor is implemented in hardware, firmware, or acombination of hardware and software.

Some aspects are described herein in connection with thresholds. As usedherein, satisfying a threshold may refer to a value being greater thanthe threshold, greater than or equal to the threshold, less than thethreshold, less than or equal to the threshold, equal to the threshold,not equal to the threshold, and/or the like.

It will be apparent that systems and/or methods, described herein, maybe implemented in different forms of hardware, firmware, or acombination of hardware and software. The actual specialized controlhardware or software code used to implement these systems and/or methodsis not limiting of the aspects. Thus, the operation and behavior of thesystems and/or methods were described herein without reference tospecific software code—it being understood that software and hardwarecan be designed to implement the systems and/or methods based, at leastin part, on the description herein.

Even though particular combinations of features are recited in theclaims and/or disclosed in the specification, these combinations are notintended to limit the disclosure of possible aspects. In fact, many ofthese features may be combined in ways not specifically recited in theclaims and/or disclosed in the specification. Although each dependentclaim listed below may directly depend on only one claim, the disclosureof possible aspects includes each dependent claim in combination withevery other claim in the claim set. A phrase referring to “at least oneof” a list of items refers to any combination of those items, includingsingle members. As an example, “at least one of: a, b, or c” is intendedto cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combinationwith multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c,a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering ofa, b, and c).

No element, act, or instruction used herein should be construed ascritical or essential unless explicitly described as such. Also, as usedherein, the articles “a” and “an” are intended to include one or moreitems, and may be used interchangeably with “one or more.” Furthermore,as used herein, the terms “set” and “group” are intended to include oneor more items (e.g., related items, unrelated items, a combination ofrelated and unrelated items, and/or the like), and may be usedinterchangeably with “one or more.” Where only one item is intended, theterm “one” or similar language is used. Also, as used herein, the terms“has,” “have,” “having,” and/or the like are intended to be open-endedterms. Further, the phrase “based on” is intended to mean “based, atleast in part, on” unless explicitly stated otherwise.

What is claimed is:
 1. A method of wireless communication performed by awireless node, comprising: determining, when in communication with aplurality of other wireless nodes via a plurality of links of a network,a plurality of transmit powers for the plurality of links, wherein theplurality of transmit powers are selected to control inter-linkinterference or to satisfy a maximum transmit power criterion; andtransmitting, using the plurality of transmit powers for the pluralityof links, information, to the plurality of other wireless nodes,concurrently, based at least in part on determining the plurality oftransmit powers for the plurality of links.
 2. The method of claim 1,wherein the wireless node is a first wireless node and the plurality ofother wireless nodes includes a second wireless node communicating withthe first wireless node using a first link of the plurality of links anda third wireless node communicating with the first wireless node using asecond link of the plurality of links; and wherein the second wirelessnode is scheduling communications on the first link and the firstwireless node is scheduling communications on the second link.
 3. Themethod of claim 1, wherein the wireless node is a first wireless nodeand the plurality of other wireless nodes includes a second wirelessnode communicating with the first wireless node using a first link ofthe plurality of links and a third wireless node communicating with thefirst wireless node using a second link of the plurality of links; andwherein the second wireless node is scheduling communications on thefirst link and the third wireless node is scheduling communications onthe second link.
 4. The method of claim 1, wherein the plurality oftransmit powers are selected to share a plurality of portions of themaximum transmit power criterion of the wireless node.
 5. The method ofclaim 1, wherein the plurality of transmit powers are selected tocontrol inter-link interference.
 6. The method of claim 1, wherein theplurality of transmit powers are determined based at least in part onreceived signaling from a central unit of the network.
 7. The method ofclaim 1, wherein the plurality of transmit powers are controlled by thewireless node.
 8. The method of claim 1, wherein the plurality oftransmit powers are determined based at least in part on receivedsignaling from another wireless node of the plurality of other wirelessnodes.
 9. The method of claim 1, wherein the plurality of transmitpowers are determined based at least in part on a scheduler node for thewireless node.
 10. The method of claim 1, wherein the plurality oftransmit powers are determined based at least in part on receivedsignaling from a group of wireless nodes, wherein the group of wirelessnodes includes the wireless node, another wireless node of the pluralityof other wireless nodes, or a combination thereof.
 11. The method ofclaim 1, wherein the plurality of transmit powers are determined basedat least in part on stored information identifying a transmit powerconfiguration.
 12. The method of claim 1, wherein the plurality oftransmit powers are determined based at least in part on upper layersignaling.
 13. The method of claim 1, further comprising: transmittingsignaling relating to a transmit power, of the plurality of transmitpowers, to at least one of: another wireless node, a central unit, or anupper layer of the network.
 14. The method of claim 1, wherein signalingprovided to the wireless node or by the wireless node, relating to atransmit power, of the plurality of transmit powers, includesinformation identifying at least one of: a configuration parameter, arequest for information identifying the configuration parameter, anapproval of the configuration parameter, a disapproval of theconfiguration parameter, a measurement, a capability indication, alimitation indication, or a schedule.
 15. The method of claim 1, whereinsignaling provided to the wireless node or by the wireless node,relating to a transmit power, of the plurality of transmit powers, isprovided via at least one of: a downlink control information signal, anuplink control information signal, a media access control controlelement signal, a radio resource control signal, a master informationblock signal, a system information block signal, a reference signal, asynchronization signal, an upper layer signaling signal, an F1-APsignal, or a beam reference signal.
 16. The method of claim 1, wherein atransmit power, of the plurality of transmit powers, is staticallydetermined.
 17. The method of claim 1, wherein a transmit power, of theplurality of transmit powers, is dynamically determined.
 18. The methodof claim 1, wherein a first transmit power, of the plurality of transmitpowers, is statically determined or semi-statically determined, whereina second transmit power, of the plurality of transmit powers, isdynamically determined.
 19. The method of claim 1, wherein a transmitpower, of the plurality of transmit powers, is determined based at leastin part on at least one of: a type of signal for transmission on a linkof the plurality of links, a type of the wireless node, a type ofanother wireless node, a state of the wireless node, a state of theother wireless node, a timing of the signal for transmission on the linkof the plurality of links, a capability of at least one wireless node,or an angular direction of the signal for transmission on the link ofthe plurality of links.
 20. The method of claim 1, wherein a firsttransmit power, of the plurality of transmit powers, for a downlinktransmission is determined semi-statically and a second transmit power,of the plurality of transmit powers, for an uplink transmission, isdetermined based at least in part on information identifying the firsttransmit power, wherein the second transmit power is controlled byanother wireless node.
 21. The method of claim 1, wherein a firsttransmit power, of the plurality of transmit powers, for a downlinktransmission is determined dynamically based at least in part on a powersharing prioritization rule and a feedback message associated withidentifying a second transmit power, of the plurality of transmitpowers, for an uplink transmission, wherein the feedback message isprovided by and the second transmit power is controlled by anotherwireless node.
 22. A wireless node for wireless communication,comprising: a memory; and one or more processors operatively coupled tothe memory, the memory and the one or more processors configured to:determine, when in communication with a plurality of other wirelessnodes via a plurality of links of a network, a plurality of transmitpowers for the plurality of links, wherein the plurality of transmitpowers are selected to control inter-link interference or to satisfy amaximum transmit power criterion; and transmit, using the plurality oftransmit powers for the plurality of links, information, to theplurality of other wireless nodes, concurrently, based at least in parton determining the plurality of transmit powers for the plurality oflinks.
 23. The wireless node of claim 22, wherein the wireless node is afirst wireless node and the plurality of other wireless nodes includes asecond wireless node communicating with the first wireless node using afirst link of the plurality of links and a third wireless nodecommunicating with the first wireless node using a second link of theplurality of links; and wherein the second wireless node is schedulingcommunications on the first link and the first wireless node isscheduling communications on the second link.
 24. The wireless node ofclaim 22, wherein the wireless node is a first wireless node and theplurality of other wireless nodes includes a second wireless nodecommunicating with the first wireless node using a first link of theplurality of links and a third wireless node communicating with thefirst wireless node using a second link of the plurality of links; andwherein the second wireless node is scheduling communications on thefirst link and the third wireless node is scheduling communications onthe second link.
 25. A non-transitory computer-readable medium storingone or more instructions for wireless communication, the one or moreinstructions comprising: one or more instructions that, when executed byone or more processors of a wireless node, cause the one or moreprocessors to: determine, when in communication with a plurality ofother wireless nodes via a plurality of links of a network, a pluralityof transmit powers for the plurality of links, wherein the plurality oftransmit powers are selected to control inter-link interference or tosatisfy a maximum transmit power criterion; and transmit, using theplurality of transmit powers for the plurality of links, information, tothe plurality of other wireless nodes, concurrently, based at least inpart on determining the plurality of transmit powers for the pluralityof links.
 26. The non-transitory computer-readable medium of claim 25,wherein the wireless node is a first wireless node and the plurality ofother wireless nodes includes a second wireless node communicating withthe first wireless node using a first link of the plurality of links anda third wireless node communicating with the first wireless node using asecond link of the plurality of links; and wherein the second wirelessnode is scheduling communications on the first link and the firstwireless node is scheduling communications on the second link.
 27. Thenon-transitory computer-readable medium of claim 25, wherein thewireless node is a first wireless node and the plurality of otherwireless nodes includes a second wireless node communicating with thefirst wireless node using a first link of the plurality of links and athird wireless node communicating with the first wireless node using asecond link of the plurality of links; and wherein the second wirelessnode is scheduling communications on the first link and the thirdwireless node is scheduling communications on the second link.
 28. Anapparatus for wireless communication, comprising: means for determining,when in communication with a plurality of wireless nodes via a pluralityof links of a network, a plurality of transmit powers for the pluralityof links, wherein the plurality of transmit powers are selected tocontrol inter-link interference or to satisfy a maximum transmit powercriterion; and means for transmitting, using the plurality of transmitpowers for the plurality of links, information, to the plurality ofwireless nodes, concurrently, based at least in part on determining theplurality of transmit powers for the plurality of links.
 29. Theapparatus of claim 28, wherein the apparatus is a first wireless nodeand the plurality of wireless nodes includes a second wireless nodecommunicating with the first wireless node using a first link of theplurality of links and a third wireless node communicating with thefirst wireless node using a second link of the plurality of links; andwherein the second wireless node is scheduling communications on thefirst link and the first wireless node is scheduling communications onthe second link.
 30. The apparatus of claim 28, wherein the apparatus isa first wireless node and the plurality of wireless nodes includes asecond wireless node communicating with the first wireless node using afirst link of the plurality of links and a third wireless nodecommunicating with the first wireless node using a second link of theplurality of links; and wherein the second wireless node is schedulingcommunications on the first link and the third wireless node isscheduling communications on the second link.